Well there are many altcoins with great potentials, which can actually last and also be successful just like bitcoin, bitcoin being the king of cryptocurrencies had made a path for altcoins to be successful, but it's so unfortunate to say that there are most altcoins which will not last, already there are so many shits coin, so this clearly states that some altcoins will be successful and survive for a long time just like bitcoin, while some will be worthless.